Hello Joeveno,
Based on game requirements, I see Windows 8.1 is not under the supported Operating System yet. Also, the graphics controller needed to run the game is a little higher than the one your computer is running. Check this:
http://www.systemrequirementslab.com/cyri/requirements/watch-dogs/11845/?p=r
NOTE: These links are being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
From our side, I recommend you updating to latest graphics driver. Here you can get it:
https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=24593&lang=eng&ProdId=3712
I also recommend you getting the latest patch for the game.
Kevin m